Compact wideband differential bandpass filter based on the double-sided parallel-strip line and transversal signal-interaction concepts

被引：35

作者：

Feng, W. J. ^{[1
]}

Che, W. Q. ^{[1
]}

Eibert, T. F. ^{[2
]}

Xue, Q. ^{[3
]}

机构：

[1] Nanjing Univ Sci & Technol, Dept Commun Engn, Nanjing 210094, Jiangsu, Peoples R China

[2] Tech Univ Munich, Lehrstuhl Hochfrequenztech, D-8000 Munich, Germany

[3] City Univ Hong Kong, State Key Lab Millimeter Waves Hong Kong, Hong Kong, Hong Kong, Peoples R China

来源：

IET MICROWAVES ANTENNAS & PROPAGATION | 2012年 / 6卷 / 02期

基金：

中国国家自然科学基金;

关键词：

DESIGN;

D O I：

10.1049/iet-map.2011.0400

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Two compact wideband differential bandpass filters based on the double-sided parallel-strip line (DSPSL) and transversal signal-interaction concepts are proposed in this study. Two transmission zeros and good harmonic suppression can be achieved for the first wideband differential DSPSL filter, because of the two transmission paths with different lengths for input/output ports. In addition, another improved common suppression wideband differential DSPSL filter with two 1808 phase inverters is introduced. Four lambda/4 shorted lines are added to improve the passband transmission characteristic for the two differential DSPSL filters. Two prototypes with 3 dB fractional bandwidth of 94 and 117.6%, and return loss greater than 15 dB for differential mode are designed and fabricated. The measured results show good agreement with the theoretical expectations.

引用

页码：186 / 195

页数：10

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